Isaiah 40:22 It is he that sitteth upon the circle (chug) of the earth, and the inhabitants thereof are as locusts: he that stretcheth out the heavens as nothing, and spreadeth them out as a tent to dwell in. Isaiah 22: 18 He will crown thee with a crown of tribulation, he will toss thee like a "ball" (du/dur) into a large and spacious country: there shalt thou die, and there shall the chariot of thy glory be, the shame of the house of thy Lord.

As anyone can see, there is a word for "ball" and one for "circle" as these words are translated and used accordingly. The Hebrew word that is used in Isaiah 44:22 (חוּג, chug) does not at all imply a spherical earth. The root word only occurs in the Hebrew Bible once as a verb (Job 26:10). In nominal forms, the same root occurs four times, three as the noun חוּג (chug; Job 22:14, Prov 8:27, Isa 40:22), and once as the noun מְחוּגׇה (mechugah; Isa 44:13). This term refers to a "circle instrument," a device used to make a circle, what we call a compass.